diff --git a/draft-ietf-quic-recovery.md b/draft-ietf-quic-recovery.md
index 4190b69253..940155438d 100644
--- a/draft-ietf-quic-recovery.md
+++ b/draft-ietf-quic-recovery.md
@@ -585,22 +585,62 @@ both the median and mean min_rtt typically observed on the public internet.
 # Congestion Control
 
 QUIC's congestion control is based on TCP NewReno{{?RFC6582}}
-congestion control to determine the congestion window and pacing rate.
+congestion control to determine the congestion window and
+pacing rate.  QUIC congestion control is specified in bytes due to
+finer control and the ease of appropriate byte counting{{?RFC3465}}.
 
 ## Slow Start
 
 QUIC begins every connection in slow start and exits slow start upon
-loss. While in slow start, QUIC increases the congestion window by the
+loss. QUIC re-enters slow start after a retransmission timeout.
+While in slow start, QUIC increases the congestion window by the
 number of acknowledged bytes when each ack is processed.
 
-## Recovery
+## Congestion Avoidance
+
+Slow start exits to congestion avoidance.  Congestion avoidance in NewReno
+uses an additive increase multiplicative decrease (AIMD) approach that
+increases the congestion window by one MSS of bytes per congestion window
+acknowledged.  When a loss is detected, NewReno decreases the congestion
+window by the loss reduction factor and sets the slow start threshold
+to the new congestion window.
+
+## Recovery Period
 
 Recovery is a period of time beginning with detection of a lost packet.
 It ends when all packets outstanding at the time recovery began have been
 acknowledged or lost. During recovery, the congestion window is not
-increased or decreased.
+increased or decreased.  As such, multiple lost packets only decrease the
+congestion window once as long as they're lost before exiting recovery.
+
+## Tail Loss Probe
+
+If recovery sends a tail loss probe, no change is made to the congestion
+window or pacing rate.  Acknowledgement or loss of tail loss probes are
+treated like any other packet.
+
+## Retransmission Timeout
+
+When retransmissions are sent due to a retransmission timeout alarm, no
+change is made to the congestion window or pacing rate until the next
+acknowledgement arrives.  When an ack arrives, if packets prior to the first
+retransmission timeout are acknowledged, then the congestion window
+remains the same.  If no packets prior to the first retransmission timeout
+are acknowledged, the retransmission timeout has been validated and the
+congestion window must be reduced to the minimum congestion window and
+slow start is begun.
 
-## Constants of interest
+## Pacing Rate
+
+The pacing rate is a function of the mode, the congestion window, and
+the smoothed rtt.  Specifically, the pacing rate is 2 times the
+congestion window divided by the smoothed RTT during slow start
+and 1.25 times the congestion window divided by the smoothed RTT during
+slow start.
+
+## Pseudocode
+
+### Constants of interest
 
 Constants used in congestion control are based on a combination of RFCs,
 papers, and common practice.  Some may need to be changed or negotiated
@@ -620,7 +660,7 @@ kLossReductionFactor (default 0.5):
 : Reduction in congestion window when a new loss event is detected.
 
 
-## Variables of interest
+### Variables of interest
 
 Variables required to implement the congestion control mechanisms
 are described in this section.
@@ -641,7 +681,7 @@ ssthresh
 : Slow start threshold in bytes.  When the congestion window is below
   ssthresh, it grows by the number of bytes acknowledged for each ack.
 
-## Initialization
+### Initialization
 
 At the beginning of the connection, initialize the loss detection variables as
 follows:
@@ -653,7 +693,7 @@ follows:
    ssthresh = infinite
 ~~~
 
-## On Packet Acknowledgement
+### On Packet Acknowledgement
 
 Invoked from loss detection's OnPacketAcked and is supplied with
 acked_packet from sent_packets.
@@ -671,7 +711,7 @@ Pseudocode for OnPacketAckedCC follows:
            acked_packets.bytes / congestion_window
 ~~~
 
-## On Packets Lost
+### On Packets Lost
 
 Invoked by loss detection from DetectLostPackets when new packets
 are detected lost.
@@ -688,7 +728,7 @@ are detected lost.
        ssthresh = congestion_window
 ~~~
 
-## On Retransmission Timeout Verified
+### On Retransmission Timeout Verified
 
 QUIC decreases the congestion window to the minimum value once the
 retransmission timeout has been confirmed to not be spurious when
@@ -699,7 +739,7 @@ the first post-RTO acknowledgement is processed.
      congestion_window = kMinimumWindow
 ~~~
 
-## Pacing Packets
+### Pacing Packets
 
 QUIC sends a packet if there is available congestion window and
 sending the packet does not exceed the pacing rate.